Patent Number: 7,711,554

Title: Sound packet transmitting method, sound packet transmitting apparatus, sound packet transmitting program, and recording medium in which that program has been recorded

Abstract: Input speech is coded in an encoder (11), the coded speech is decoded in a decoder (12), compensatory speech which compensates the speech of the current frame is generated in a compensatory speech generating part (20) by using past decoded speech, the quality of the compensatory speech is evaluated by using the input speech and the compensatory speech and a duplication level is generated the value of which increases incrementally with decreasing speech quality evaluation value in a speech quality evaluating part (40), and as many identical packets as the number specified by the duplication level is generated for the coded speech in a packet generating part (15), and the packets are transmitted, thereby reducing the possibility that packet loss will occur at the receiving end.

Inventors: Mori; Takeshi (Higashiyamoto, JP), Ohmuro; Hitoshi (Kodaira, JP), Hiwasaki; Yusuke (Kodaira, JP), Kataoka; Akitoshi (Nerima-ku, JP)

Assignee: Nippon Telegraph and Telephone Corporation

International Classification: G10L 19/14 (20060101); G10L 21/04 (20060101); G10L 21/02 (20060101)

Expiration Date: 5/04/12018